I believe the answer is: A. <span>Voluntary exchange
The word voluntary exchange come from the efforts that people make to fulfill their needs.
For example, i am an accountant that couldn't cook fried rice, but i have a lot of money from my salary.
Tina is a cook that could cook fried rice and needed money to pay for her children's school.
So, we decided to voluntarily exchange small amount of my salary with the fried rice so both of our needs are fulfilled.</span>
I think the correct answer from the choices listed above is option A. The Supreme court case snyder v. phelps is an example of competing rights because the right of privacy and speech causing emotional distress came into conflict with the freedom of speech. Hope this answers the question.
Silk went westward, and wools, gold, and silver went east. China also received Nestorian Christianity and Buddhism (from India) via the Silk Road.